/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.dtstack.flinkx.hbase.writer.function;

import org.apache.commons.lang.StringUtils;

/**
 * @company: www.dtstack.com
 * @author: toutian
 * @create: 2019/7/23
 */
public class FunctionFactory {

    public static IFunction createFuntion(String functionName) {
        if (StringUtils.isBlank(functionName)) {
            throw new UnsupportedOperationException("function name can't be null!");
        }

        IFunction function = null;
        switch (functionName.toUpperCase()) {
            case "MD5":
                function = new Md5Function();
                break;
            case "STRING":
                function = new StringFunction();
                break;
            case "CONSTANT":
                function = new ConstantFunction();
                break;
            default:
                throw new UnsupportedOperationException(String.format("function name[%s] don't exist!", functionName));
        }
        return function;
    }

}
